新手轻喷。小弟在看head first 的 PHP & MySQL，第二章用命令行创建数据库：
tony@Tony-Laptop-Ubuntu$ ~ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 41 Server version: 5.5.29-0ubuntu0.12.04.1 (Ubuntu) Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> CREATE DATABASE aliendatabase; ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'aliendatabase'
求大神解释加解决方案～小弟拜谢！
没权限，用root登录：
mysql -uroot
如果root有密码：
mysql -uroot -p